Mill-stock mixer and distributer.



No1 882.925.l PATBNTED MARLZ, 1.908.'

F. C. BoYNToN.

MILL STOCK MIXER ANDDISTRIBUTBRQ APPLICATION rILnD mas, 1907.

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UNITED sTA'rEsrarENr oEEioE. i

* FREDERICK (l. BOYNTON, O

No. 882,925, Specification o To all whom 'it may concern:

' Be it known that I, FREDERICK C. BOYN- TON, a citizen of the UnitedStates, residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in Mill-Stock Mixers and Distributers, of which the following is aspecification.

My invention relates to devices for use in flour-mills for mixing anddistributing or feeding stock to the various machines.

The object of my improvements is to roduce an apparatus that is capableof tioroughly mixing material or stock of different kinds anddischarging the mixture uniformly and in desired quantities.

My improved apparatus comprises a cylindrical casing containing seriesof revolving mixers or flights in radial arrangement7 and means forintroducing material to the casing and for discharging it in regulatedquantities. Such improvements are illustrated in 'the accompanyingdrawings, in which- Figure 1 is a central vertical section of myimproved mixing and feeding machine; Fig. 2 is a horizontal section onthe irregular line 2-z of Fig. 1; Fig. 3 is a vertical section of thedevice for regulating the discharge of material; Fig. 4 is a horizontalsection of the same; and Figs. 5 and 6 are detail views yof one of theflights.

In the drawings 1 designates the legs and 2 the cross-pieces of thesupporting frame of the machine. On the top of the frame is a shortcylindrical .casing 3 the bottom of which is secured to the frame bybolts 4. On the lower cross-piece is mounted7 a driving-shaft 5 carryinga miter-gear 6,' Vand above it is supported a spindle or vertical shaft7 having a miter-gear 8 in mesh with the gear 6. The spindle issupported by means of a collar 9 in contact with a boss 10 formed on across-piece 11 in which the spindle has a bearing and the spindle alsohas a bearing at 12 in the upper frame cross-piece. Power may be appliedto the shaft 5 by means of a pulley and belt for rotating the spindle.

To the head of the spindle 7 is secured by a set-screw 13 the hub 14 ofa spider having a plurality of arms 15, preferably four, radiating fromthe hub. A series of flights or mixers 16 is formed on or attached tothe under surface of each arm 15, preferably at angles of aboutforty-five (45) degrees to the axis of the arm, with their lower endsar- F MINNEAPOLIS, MINNESOTA.

MILL-STOCK MIXER AND DISTRIBUTER.

f Letters Patent. Patented March 24, 1908.

Application filed August 8, 1907 Serial No. 387,592.

ranged on a plane a short distance above the bottom of the casing. Theflights preferably consist of-flat blades having their upper portionscontracted and provided with curved flanges 17 for the purpose ofstrengthening the bases of the nights.

The top of the case consists of a fixed middle portionA 18 and lids 19hinged to its edges for providing convenient means for access.to theinterior. The feed-spout 2() for supplying material to the machine isarranged to discharge 'at the center of the cover and beneath its mouthis an inclined guide-trough 21 for catching the descending material andproperly delivering it to the mixers. This trough is preferablysemicircular and is attached by a fastener 22, or otherwise, over thecenter of the spider so as to revolve with the spider and deliver thestock in a circular path coincident with the circle of action of theinner flights. By this arrangement an accumulation of stock at thecenter is avoided and the stock is subjected to the action of the mixersfrom the point of admission throughout its travel to the sides of thecase.

In the sides of the case are discharge openings 23I at any desiredintervals, and connected with them are spouts 24 for conduct- 'ing thematerial to the proper machines for further treating it.

The quantity of stock fed from the machine into any of the spouts 24 iscontrolled by a feed -regulaton This regulator conthe upper portion ofthe spout 24, and'having a tangential flange 26. The body 25 and flange26 are preferably soldered or otherwise attached to a curved plate 27which may be secured to the case 3 at the sides of the o enings 23 byscrews or rivets 28 or in any esired way. A cover 29 at the top and abase 30 at the bottom of the flange 26 inclose the space between theflange and the plate 27. An opening 31 in the cylinder 25 is providedfor the passage of material from the case opening 23 to the dischargespout 24.

Within the body 25 is a short concentric cylinder 32 which has anopening 33 in its side for the passage of material to the spout. Thiscylinder is open at the bottom and closed at the top by a cover 34 'therim of which seats on the upper edge ofthe body 25. This inner cylinderor tube is ada ted to be turned Within the outer tube, an a handle 35 isprovidedon the cover 34 for that purpose, to adjust the location of theopening 33 with reference to the opening 23 for regulating the dischargeof stock. 'lt is desirable to have the revolu ble tube fit close enoughwithin the fixed. tube to be held in positions of adjustment byfrictional contact, without th'e employment of a holding device. Suchfeed-regulator furnishes convenient and eilicient means for regulating,or cutting off, the feed of stock from the machine to a discharge spout.

Having described my invention, what I claim and desire to secure byLetters Pat ent is l. A mill-stock mixer and distributer, comprising acasing providing a circular chamber having a plurality of outlets at itssides, means for introducing stock to the center thereof, a revolvingspider therein having radial arms provided u ith flights adapted to workthe stock from the center to the circumference, discharge spouts, hollowrotary valves having openings in their sides for controlling the passageof stock from said outlets to said spouts, and means for adjustablyrotating such valves, substantially vas set forth.

2. A mill-stock mixer and distributer, comprising a casing providing arevolving feed-trough for introducing stock in a circu lar path aroundthe center of the chamber, a revolving spider in the chamber havingradial arms provided with flights adapted to work the stock from thecenter to the circumference, discharge spouts connected with saidoutlets, and controllable valves therefor for regulating the passage ofstoclcthrough' trolling the passage of stock from said outlets,

to said spouts, and tangential flanges and passage-n ays for directingthe stock to such openings, and means for adjustably rotating suchvalves, substantially as set forth.

4. A mill-stock mixer and distributer, comprising a casing providing acircular chamber having a plurality of outlets at its sides, means forintroducing stock to the center thereof, a revolving spider thereinhaving radial arms provided with flights adapted to work the stock fromthe center to the circumference, a feed-trough carried in inclinedposition by the spider for introducing stock in a circular path aroundthe axis of the spider, and discharge spouts connected with saidoutlets, substantially as set forth.

In testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses this 29th day of July, 1907.

FREDERICK C. BOYNTON. Vitnesses:

P. H. GUNCKEL, H. A. BowMAN.

